---
title: "Interface SignatureAlgorithm"
author: "Jonas Paprotka"
url: https://jonas-paprotka.de/ref/interface/signaturealgorithm/
type: interface
name: "SignatureAlgorithm"
app: "System Application"
namespace: System.Security.Encryption
versions: "17-26"
build: 26.5.38752.40541
obsolete: "Pending 24.0"
source: "https://jonas-paprotka.de/ref/interface/signaturealgorithm/source/24/ https://jonas-paprotka.de/ref/interface/signaturealgorithm/source/25/ https://jonas-paprotka.de/ref/interface/signaturealgorithm/source/26/"
checked: 2026-09-20
subject: "Microsoft Dynamics 365 Business Central"
license: "Content © 2026 Jonas Paprotka. Quote freely with attribution and a link."
---

# Interface SignatureAlgorithm

Jonas Paprotka, https://jonas-paprotka.de/ref/interface/signaturealgorithm/

| | |
| --- | --- |
| App | System Application |
| Namespace | System.Security.Encryption |
| Versions | 17-26 |
| Obsolete | Pending 24.0, seen from 24. Replaced by Signature Algorithm v2 with SecretText support for XmlString. |
| Source file | Cryptography Management/src/SignatureAlgorithm.Interface.al |

## Procedures

| Name | Parameters | Returns | Access | Versions | Obsolete | Reason |
| --- | --- | --- | --- | --- | --- | --- |
| GetInstance | (var DotNet AsymmetricAlgorithm) | - | public | 17-26 | - | - |
| FromXmlString | (Text) | - | public | 17-26 | - | - |
| SignData | (InStream, Enum Hash Algorithm, OutStream) | - | public | 17-26 | - | - |
| ToXmlString | (Boolean) | Text | public | 17-26 | - | - |
| VerifyData | (InStream, Enum Hash Algorithm, InStream) | Boolean | public | 17-26 | - | - |

## Source

Symbols: Microsoft.SystemApplication.symbols.63ca2fa4-4f03-4f2b-a480-172fef340d3f, https://dynamicssmb2.pkgs.visualstudio.com/DynamicsBCPublicFeeds/_packaging/MSSymbols/nuget/v3/index.json, highest build per major on 2026-09-20.
AL source 24: https://github.com/microsoft/BCApps, MIT, releases/24.x at fe14d3e6db00d28df3a69c7bba830813d70794e2.
AL source 25: https://github.com/microsoft/BCApps, MIT, releases/25.x at 68d52c129129c83b2e396a473aaa5b2ce61d2eed.
AL source 26: https://github.com/microsoft/BCApps, MIT, releases/26.x at 78c4acf0d64a8eee157ea80164fa8fc2acffc9eb.

Jonas Paprotka, 2026-09-20.